That still doesn't sound too much different than what S@H does, which is just a wider area version of what render farms do. Except, that your idea seems like it would increase inefficiency and cause bandwidth sucking, because what it sounds like you're saying is not to send all data needed for a task to each computer and have it work on it alone, but to use each computer like a separate CPU. To decrease the inefficiency, you'd have to send large large chunks of data instead of swapping bits back and forth. But, then you'd be back at the S@H/renderfarm idea.
I poopoo your idea. :-)